Civil Engineering MCQAE Level Civil Engineering
Parallax in aerial photography is used for:
SurveyingRemote SensingHARD
Choose the correct answer
A
Determining ground resolution
B
Measuring heights of objects (differential parallax ΔP = B×Δh/H)
C
Colour correction
D
Removing distortion only
Correct Answer
B. Measuring heights of objects (differential parallax ΔP = B×Δh/H)
Why is this the answer?
Stereoscopy: two overlapping photos (60% endlap) give 3D view. Height: Δh = H×ΔP/(B+ΔP) where H=flying height, B=air base (overlap distance), ΔP=differential parallax. Used in photogrammetric DEM generation.
Related Surveying MCQs
More solved Surveying questions for AE/JE Civil Engineering exams.
- A 'Digital Elevation Model' (DEM) is used in GIS for:
- 'Contour interval' selection for a topographic survey depends on:
- The 'photogrammetric control' (ground control points) in aerial survey are required for:
- The 'EDM' (Electronic Distance Measurement) instrument measures distances using:
- The 'photogrammetric stereomodel' from two overlapping aerial photos allows...
- The 'corrections' applied to measured chain/tape lengths include all EXCEPT:
Practice more Civil Engineering questions
This MCQ belongs to Magic Mock Test Series — WBPSC AE Civil (Preliminary). Full tests include timed attempts, rank comparison and subject-wise analysis.